Iridium(III) sulfate react with ammonium sulfate and water

Ir2(SO4)3 + (NH4)2SO4 + 24H2O → 2{NH4Ir(SO4)2•12H2O}

Iridium(III) sulfate react with ammonium sulfate and water to produce iridium(III)-ammonium sulfate dodekahydrate. Iridium(III) sulfate and ammonium sulfate - saturated solutions. This reaction takes place at a temperature near 0°C.